1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e71965d6c9dc037945e2a2cbe39c3c5fb83a95362f52f378de2aa7b7f390a0. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa9dd462-c67e-43a1-9653-bf36a1e98cb4.json and https://artists.proofprofile.net/proofs/artist/aa9dd462-c67e-43a1-9653-bf36a1e98cb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65eca6e7ef92da1a4ff380db2e68161c9af9ed3bb35a5e12e20a529b07a2fa1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82322889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610e28f4c46f567b44defa172cbc293b72b5c5dad9ca7bc7931d86516e3759cd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82402174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f35cfd0c3d5eaaaf806c60350ffe2bc280c19e7d613f0e5668991419b9de23b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82414821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266ebf848dbbd96c814c8f44149fa065401316a8aa19fcffb41c40863a1f5fcb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82431840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58228524356c72006839228bf33997dcf76611730c1a17dd5eb0f8150f1eebd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:40:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82445886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa466f13ec0e770db81b29147f0521062d8778a6acee201efdac1a4e5034a7f56. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82449123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa517d2f02aa53c9e5af1d8e2069dda8326919193d7d194641e07b334c575d99. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82453841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0eaa0967646809ec0e7b76819f1efc59cc4dceb82627ee54a23b1dafbe2c8e9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82457291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65818389711f1ea01e5dbf39185b89966d9596d14013e2983781bb03d0ac95a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82502693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0084d2a1522607f8d57a0ec61a5b0e94ae9162b5884a3127aa1e58bb1b06ef86. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPI82509957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cadb1bc1e8e94d73d6e12aeaf2ec9e132e7995028524f4089b5628841c0322. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2589830.